Optical filter for a stereoscopic display device comprising one or more alignment layers each having partition wall parts with height greater than that of center part and stereoscopic display device comprising the same

a stereoscopic display device and optical filter technology, applied in the field of optical filter and stereoscopic display device, can solve the problems of high production cost, complicated manufacturing process, limited viewing angle, etc., and achieve the effect of improving optical performance and not increasing the line width of the pattern

Active Publication Date: 2014-11-04
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution ensures stable optical performance by preventing liquid crystal layer thinning and surface contamination, enabling precise alignment and adjustment of pattern line width and thickness, thus improving the quality of stereoscopic images.

Problems solved by technology

Although the inconvenience of wearing glasses exists with regard to the glasses type stereoscopic display device, limitations on viewing angles are relatively small, and fabrication is relatively easy.
According to the method of patterning the polarizing plate itself, because a chemical etching process should be performed, a manufacturing process may be complicated and a production costs are high.
However, according to the laser etching technique, the retardation layer may be easily damaged or deformed due to heat, thereby increasing a defect ratio.
However, since the roll printing technique is a type of contact printing technique, a printing plate surface may be easily contaminated during printing, and a new printing plate should be used for adjusting a line width.
Therefore, the roll printing technique is not suitable for small quantity batch production.
However, according to an optical filter manufactured by using a typical method, it is difficult to correctly match the pixels of the display device and the optical filter pattern.
Therefore, the liquid crystal layer cannot contact the alignment layer, thereby generating a non-aligned portion and limiting the realization of high-quality stereoscopic images.

Method used

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  • Optical filter for a stereoscopic display device comprising one or more alignment layers each having partition wall parts with height greater than that of center part and stereoscopic display device comprising the same
  • Optical filter for a stereoscopic display device comprising one or more alignment layers each having partition wall parts with height greater than that of center part and stereoscopic display device comprising the same
  • Optical filter for a stereoscopic display device comprising one or more alignment layers each having partition wall parts with height greater than that of center part and stereoscopic display device comprising the same

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0082]4 wt % of a norbornene monomer side-substituted with a cinnamate group and fluorine, 4 wt % of pentaerythritol triacrylate (PETA), and 0.5 wt % of a photoinitiator (Irgacure 907) were dissolved in 91.5 wt % of cyclohexanone to prepare an alignment layer forming composition. Viscosity and boiling point of the alignment layer forming composition were 7.4 cp and 157° C. respectively.

[0083]The alignment layer forming composition was provided to an inkjet printer, and then was printed in a stripe form having a line width of 350 μm and a line distance of 400 μm. Then, the printed composition was dried for two minutes at a temperature of 80° C., and a wire grid polarizing plate was mounted at an angle of 45° to be irradiated with ultraviolet (UV) rays, to thereby form an alignment layer. FIG. 6 illustrates a shape of the above-described alignment layer, which was measured by using an optical measurement device (equipment name: non-contact 3D profiler, manufacturer: Nano System). In F...

embodiment 2

[0086]An alignment layer was formed by using the same method as in Embodiment 1 except that diisobutylketone was used as a solvent of the alignment layer forming composition and the viscosity and boiling point were 12.1 cp and 169° C. respectively. Next, a liquid crystal layer was formed by using the same method as in Embodiment 1.

embodiment 3

[0087]4 wt % of a norbornene monomer side-substituted with a cinnamate group and fluorine, 2 wt % of pentaerythritol triacrylate (PETA), and 0.5 wt % of a photoinitiator (Irgacure 907) were dissolved in 93.5 wt % of a solvent in which cyclohexanone and cyclopentanone were mixed with each other at a ratio of 1:1 to prepare an alignment layer forming composition. Viscosity and boiling point of the alignment layer forming composition were 7.2 cp and 143.5° C. respectively. An alignment layer was formed by using this alignment layer forming composition in the same manner as described above in Embodiment 1. Next, a liquid crystal layer was formed by using the same method as in Embodiment 1.

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Abstract

An optical filter for a stereoscopic display device separating left-view and right-view images includes a substrate, one or more alignment layers formed on the substrate in a predetermined pattern and each having partition wall parts on edges of each alignment layer, and one or more liquid crystal layers formed on the alignment layers, wherein a height of each of the partition wall parts is two to ten times greater than a thickness of a center part of each alignment layer.

Description

[0001]This application is a National Stage application of PCT / KR2011 / 008558, filed Nov. 10, 2011, which claims priority to and the benefit of Korean Patent Application Nos. 10-2010-0111853, filed Nov. 11, 2010 and 10-2011-0105504, filed Oct. 14, 2011, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD[0002]The present invention relates to an optical filter and a stereoscopic display device including the same, and more particularly, to an optical filter of which patterned line width and liquid crystal layer thickness are easily adjustable, and of which optical characteristics are excellent due to prevention of mixing between liquid crystal layers, and a stereoscopic display device including the same.BACKGROUND ART[0003]A stereoscopic display device produces a three-dimensional image, similar to an actual object, as seen by a human being, by providing different images to the left and right eyes. In general, a human being perceives three-dimensional objec...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): G02B27/22G02B27/26G02F1/1337G02B5/20G02B30/25G02B30/31
CPCG02B5/201G02B27/22G02B27/2214G02B27/26G02B30/25G02B30/31G02F1/13363G02B30/27
InventorKIM, HYUN-SIKPARK, JUNG-HO
OwnerLG CHEM LTD